Mixing and turbulence-effecting means for carbureted fuel



12, 1958 J. c. BUHRMEISTER 2,847,289

MIXING AND TURBULENCE-EFFECTING MEANS FOR CARBURETED FUEL 7 Filed NOV. 50, 1955 V INVEN TOR. Jail/2 C'. Buh'mewter United States Patent MIXING AND .TURBULENCE-EFFECTING MEANS F OR CARBURETED FUEL John C. Buhrmeister, Staten Island, N. Y.

Application November 30, 1956, Serial No. 625,344

2 Claims. (Cl. 48-180) This invention relates generally to the art of carbureting or mixing of fuel with air, for the purpose of preparing the fuel for combustion in internal combustion engines and the like.

An object of the invention is to provide a novel and improved means for use in the intake of an engine, be tween the carbureter and the intake manifold, by which more complete mixing and vaporization of the fuel is effected prior to the introduction of the same into the engine cylinders.

Another object of the invention is to provide a novel and improved device for use in an engine-intake pipe, by which there is increased the turbulence of the combustible mixture, thereby effecting a more thorough mixing and vaporization thereof.

Yet another object of the invention is to provide an improved turbulence and mixing means as above characterized, which is adaptable for installation as an attachment to existing intake pipes, with a minimum of alteration to the same.

A feature of the invention resides in the provision of an improved turbulence-efiecting attachment of the above nature, which is characterized by immovable parts or components, thereby to preclude the possibility of the attachment getting out of order or becoming inoperative because of heat or other conditions of use, or age.

A still further object of the invention is to provide an improved mixing and turbulence-effecting device having all of the above features and advantages, and which is nevertheless extremely simple and rugged in its construction, and economical to manufacture.

Other features and advantages will hereinafter appear.

In the drawings accompanying this specification, similar characters of reference indicate corresponding parts wherever possible in the several views, in which:

Figure l is a top or plan view of the improved mixing and turbulence-effecting device of the present invention.

Figure 2 is a sectional view of the device of Figure 1, taken on line 22 thereof, there being also shown in section the adjoining portions of an intake pipe such as is disposed between the carbureter and the intake manifold in an internal engine.

Referring first to Figure 2, there is shown a usual type of intake line or pipe 10, as is commonly utilized between a c'arbureter (not shown) and an intake manifold (not shown) of an internal combustion engine. The intake pipe normally comprises a pair of tubular members 11 and 12 provided with cooperable, apertured flanges or lugs 13 and 14 respectively, through which bolts 15 are passed to secure together the sections 11 and 12.

In accordance with this invention I provide a novel and improved accessory or attachment for insertion in the intake pipe 10, preferably between the flanges 13 and 14 thereof, for the purpose of greatly increasing the turbulence and more completely mixing the carbureted fuel flowing downward through said intake, thereby to 2,847,289 Patented Aug; 1 1958 ice 2 more effectively vaporize the fuel and eliminate liquid droplets, to the end that a more powerfulcombustion is had in the engine cylinders. My improved device is preferably constituted as an attachment, by which it may. be easily and quickly inserted in the intake pipe 10, this being accomplished by disposing a gasket-like portion thereof between the cooperable flanges 1 3 and 14.

As shown, the gasket-like portion ofmy device, indie cated at 17, is roughly of oval shape, havingpointed ends 18 and 19 provided with openings 20 through which the bolts 15 may pass. It will be understood that the portion 17 may have virtually the same shape as the usual gasket employed between the cooperable flanges 13 and 14 for the purpose of sealing the joint between the pipe sections 11 and 12. I

In accordance with this invention, on the inner peripheral edge 22 of the gasket-like portion 17 I provide a pair of supporting, inwardly-extended lugs 23 and 24, and carried by said lugs is a turbulence-efiecting member 26, shown as formed from a section of tubing having a straight cut-ofi end 28 and a diagonal cut or edge 29. The upper wall 30 of the turbulence-effecting member 26, shown as formed from a section of tubing having a straight cut-off end 28 and a diagonal cut or edge 29. The upper wall 30 of the turbulence is convex or bulbous efiecting member 26 and adapted to be secured to the supporting lugs 23, 24 in any suitable manner, as by welding, riveting or the like, thereby to support the member 26 mostly below the plane of the gasketlike portion 17.

As shown in the figure, the left-end portion of the member 26 is completely tubular, whereas the center and right-end portions are tapering and semicircular in cross section. The right extremity 32 of the wall 30 is narrow and almost pointed, by virtue of the diagonal cutoff providing the diagonal lower edge 29.

By the present invention I also provide, in the upper wall 30, an opening or hole 34 having preferably a slight counter-bore 35, and I have found that by the provision of such opening 34 there is greatly decreased the tendency for eddy currents to occur in the flow of carbureted fuel, at locations below the member 26. In other words, by the provision of the opening 24 there is minimized to a great extent the formation of a low-pressure area or vacuum, below the top wall 30, which would result in the formation of eddies tending to retard the downflow of the fuel mixture.

I have found that, by the provision of my improved attachment as above set forth, there is effected an increased turbulence of the fuel mixture, thereby resulting in the elimination of liquid particles or globules as such, and causing a more complete vaporization and mixing of the fuel with the intake air. As a consequence, better or more complete combustion is had in the engine cylinder, giving better performance and more economy. Moreover, my improved attachment is devoid of all moving parts, and therefore cannot get out of order or become inoperative due to elevated temperatures, ex-

tended periods of use, backfires, etc. The attachment may be easily and quickly installed, even by an unskilled person, upon removal of the existing bolts 15 and slight separation of the intake pipe sections 11 and 12, as will be readily understood.

Variations and modifications may be made within the scope of the claims, and portions of the improvements may be used without others.

I claim:

1. Means for increasing the turbulence in a stream of carbureted fuel mixture, comprising an elongate, hollow member adapted to be disposed transversely across a fuel intake pipe, said member having a bulbous surface facing opposite to the direction of flow of the fuel mixture, and having an opening in said surface by which there is reduced the tendenoy for vacuum to form at the hollow side of the member, and said member being at one end tubular, and said member furtherhaving diagonal edges "extending from said tubular portion toward the other end of the-member.

2. The. invention as defined in claim 1 in which there is mounting means'comprising aflat gasket-shaped base having a substantially large central opening, and having inwardly extended lugs disposed at opposite points around said central opening, said member at its ends being secured to the said lugs,

References Cited in the file of this patent UNITED STATES PATENTS Livingston Feb. 14, 1922 Wenberg Apr. 22, 1924 Hamilton Nov. 2, 1926 FOREIGN PATENTS Great Britain of 1913 Great Britain June 1, 1922 Great Britain Jan. 4, 1923 

1. MEANS FOR INCREASING THE TURBULENCE IN A STREAM OF CARBURETED FUEL MIXTURE, COMPRISING AN ELONGATE, HOLLOW MEMBER ADAPTED TO BE DISPOSED TRANSVERSELY ACROSS A FUEL INTAKE PIPE, SAID MEMBER HAVING A BULBOUS SURFACE FACING OPPOSITE TO THE DIRECTION OF FLOW OF THE FUEL MIXTURE, AND HAVING AN OPENING IN SAID SURFACE BY WHICH THERE IS REDUCED THE TENDENCY FOR VACUUM TO FORM AT THE HOLLOW SIDE OF THE MEMBER, AND SAID MEMBER BEING AT ONE END TUBULAR, AND SAID MEMBER FURTHER HAVING DIAGONLA EDGES EXTENDING FROM SAID TUBULAR PORTION TOWARD THE OTHER END OF THE MEMBER. 